Cardiff Council's 'Usual Suspects' campaign carries the message: "There's no excuse for dropping litter."
The anti-grime crackdown will focus on three main points:
- Dog fouling
- Fly tipping
The council's waste team is also telling dog owners there is a fine of £75 if caught not cleaning up after their dogs.
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The two projects going head-to-head today are: For the Young at Heart and Y Gwndwn.
David and Angela Southwood, from Newport, say they plan to live in a caravan over the border after learning of the decision.
The fog is expected to become quite widespread and locally dense and freezing during the evening